A Solenoid Metering Pump with Stroke Length and Frequency adjustments, 100:1 turn down. Provides manually controlled dosing from 6 GPD @ 80 PSI to 30 GPD @80 PSI. Available in PP, PVC or PVC Degass materials and CSPE, Viton or TFE seals with Ceramic check balls; contact us for other material needs. Each pump is complete with bleed valve, tubing, foot valve and 1/2"NPT injector to complete any installation.